Swinging electric bracket.



om 0 9 l .|.y l um E F D E T N w T M E K7. Cw A1 R8, .BY NCM WMJ OTw MCL EN FEM LGN Nm Mu Nn mA s om 9 41 8 7 8 nw N mounte UNITED STATES PATENT OFFICE JOHN F. BROWN, OI*` TOLEDO, OHIO.

SWINGING ELECTRIC BRACET.

Specification of Letters Patent.

' Patented Feb. 11, 1908.

Application filed July 8. 1907. Serial No. 382.590.

which it appertains to make and use the` same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form part of this specification.

This invention relates to improvements in electric fixtures and it has for its object to provide a swinging electric bracketwhich shall be free from loose flexible connections at or around the joint to eliminate the danger of short circuiting or grounding.

The invention embodies the novel combination, arrangement and the details of construction hereinafter shown, described and claimed.

In the accompanying drawings, Figure 1 is an elevation showing an external view of my swinging bracket Fig. 2 is an elevation in part section; Figs. 3 and 4 are respectively top and bottom plan views of the non-conducting disks which I employ in my improved construction.

Referring to the details, 1 indicates a stationary part of the fixture and 2 a hollow arm to swing upon the stationary part, a joint being provided at 3. Dis osed within the arm 2 are the insulated fexible conductors 4 and 5, the outer terminals 6 of which are adapted to be connected to an incandescent lamp socket, while the inner terminals pass upwardly through a tubular extension 7 carried by and rotatable with the swinging arm, being disposed at the axis of the joint between the stationary part and the swinging arm. The inner terminals of the conductors 4 and 5 after emerging from the tubular `extension 7 are connected with resilient contact fingers 8 and 9 carried upon a non-conducting disk 1() firmly supported upon the tubular extension 7. The means for securing the disk 10 and fo.` adjusting the same 'along the tubular extension comprises nuts 11 and 12 screwed upon the extension, the latter being externally threaded and the disk being clamped between the faces of the nuts. The stationary part 1 has a portion 13 disposed about the tubular extension 7 adapted .to support a non-conducting disk 14, which is parallel to the disk 10 and is secured against rotation by a notch 15 in its periphery receiving a projection 16 upon the part 13. Upon the disk 14 are firmly secured a pair of concentric conductor rings 17 and 18 adapted to be traversed by the resilient fingers 8 and 9. The tension of the iingers upon the rings may be varied by 'adjusting the nuts 11 and 12 to alter the distance between the non-conducting disks. The terminals which supply current to the fixture pass through the stationary party l and are connected with the rings 17 and 18 at 19 and 20 respectively. 21 is a detachable shell upon tie portion 13 adapted to inclose and conceal the non-conducting disks and the contacts thereon, the shell being held in place by screws, as at 22. It is thus seen that upon turning the tubular arm of the fixture, the disk 10 will also turn to cause the resilient fingers to traverse the concentric conductor rings, the connections at the joint being free from liability of short circuiting or grounding.

Having described my invention, WhatI claim and desire to secure by Letters Patent, is

1. In an electric fixture, a stationary part, a swinging arm jointed theretov and having a tubular extension at the axis of its joint with the stationary part, a non-conducting disk supported against rotation upon the Ystationary part, concentric conductor rings carried by said stationary disk, a second non-conducting disk carried upon the tubular extension of the swinging arm, resilient contact fingers supported by said second disk and adapted to traverse the concentric conductor rings, feed wires connected with the concentric rings, and flexible conductors leading from the resilient contact fingers to the outer end of the swinging arm through the tubular extension at the axis of its joint with the stationary part, substantially as described.

2. In an electric fixture, a stationary part, a swin ing arm jointed thereto and having a tubu ar extension at the axis of its joint with the stationary part, a non-conducting disk supported against rotation upon the stationary part, concentric conductor rings carried by said stationary disk, a second non-conducting disk carried upon the tubular extension of the swinging arm and adjustable thereon relative to the stationary disk, resilient contact -ingers supported by said second disk and adapted to traverse the concentric conductor rings, feed* wires con- In testimony,'that claim the foregoing nected With the concentr1c rings, and iexias my own I affix my signature, in presence ble Vconductors leading from the resilient of two Witnesses. A

contact fingers to the outer end of the swing- A JOHN F. BROWN. ing arm through the tubular extension at, Witnesses: A the axis of its joint with the stationary part, CARL H. KELLER,

- substantially as described. L. M. FLU'HART. 

